基于强度折减法的边坡稳定性三维有限元分析

将强度折减法应用于边坡稳定性分析中，折减土体强度，代入有限元程序进行计算，直至计算不收敛，此时的折减系数即为安全系数。将强度折减法应用于边坡稳定性的三维分析，结合工程实例，基于强度折减法的边坡稳定性有限元法和传统极限平衡法的计算结果，对边坡稳定性二维分析和三维分析的结果进行了对比，表明基于强度折减法的边坡稳定性三维有限元分析是可行的。在边坡稳定性分析中，为得到更符合实际情况的结果，在有条件的前提下宜补充进行边坡稳定性三维分析。

3D FEM ANALYSIS OF SLOPE STABILITY BASED ON STRENGTH REDUCTION METHOD

By using the strength reduction method in the analysis on slope stability,the soil strength is reduced,so that the numerical non-convergence occurs,and the safety factor is obtained. The strength reduction method is applied to 3D analysis on slope stability in this paper. At the same time,with a case study,the result analyzed by the traditional method is compared with that by strength reduction FEM,and the results of 2D and 3D analyses are analyzed. It is indicated that strength reduction FEM is appropriate to stability analysis of slope,and 3D analysis should be used in stability analysis of slope if it is possible.